Sewing-machine.



W. A. MGUOOL.

SEWING MAGHINE. APPLICATION FILBI) JUNE 16, 1910.

93,501 Patented Feb.7,1911.

4 SHEETSSHEET 1 W. A. M00001].

SEWING MACHINE.

APPLICATION FILED JUNE 16, 1910.

Patented Feb. 7, 1911.

4 SHEETS-S11E31 2.

- (liter/ e1 5 W. A. MGCOOL.

SEWING MAOHINE.

APPLIOATION FILED JUNE 16, 1910.

93,57, Patented Feb. 7, 1911.

4 SHEETS-SHEET 3- w. A. MoGOOL.

SEWING MAGHINB. APPLICATION FILED JUNE 16, 1910.

Patented Febfli 1911.

4 SHEETS-SHEET 4.

M Q Q UNITED sTAiEs PATENCr o -EIOE- WILLIAM A} MccooL, or BEA'vER FALL-S, PENNSYLVANIA, AssI'GNoR TO ACME- KEYSTONE MFG. coMrA Y, a CORPORATION or PnNNsYLvaNm.

Beaver Falls, in the county of Beaver and State of Pennsylvania, have invented or discovered certain new and useful Improvements in Sewing-Machines, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to blind stitch sewing machines such for example as those shown and described in U. S. Patents Nos. (339,669 and 679,553, in which the needle is caused to pass through a ridge or bend in the work in such a manner that the stitches will be visible only on one side of the work; and the invention has .for its object to provide a machine, of the class referred to,-

which will not only afford more room heneath the arm which supports the stitch,-

' forming mechanism than is atl'orded in the machines of the patents above referred to, as in the machines shown by myapplieation for U. S. Letters PatentfiledMay 22, 1906, Serial No. 318,480, but which will also contain a positively-operated lower feed cooperating with an upper feed, as in the machine of said Patent No.- 679,553.

In the accompanying drawings, Figures 1 and 2 are side views of the improved machine, looking from opposite sides. with certain parts in vertical section; Fig. 3 is a front view of the same, partly in vertical section, andFig. 4 is a rear view of the improved machine. Figs. 5 and 6 are detail views, partly in section, illustrative of the lower feeding device and of the mechanism for operating the ridge-forming device.

Rcferringto the drawings, 12 denotes the lower portion of the frame of the machine from which, at its rear end, rises a standard 13 with which is pivotally connected. bya hinge pin 14, a stitching frame con'iprisiug a rear portion 15 in which is mounted the driving shaft 16. said frame also comprising an overhanging, arm 17 providing bearings fora rocking shaft 17 to the front end of which is secured the vibrating armlS carrying the curved needle 19. The said arm 17 also supports the npper feeding device comprising the feed-dog 20 connected ith an arm 21-pivotally mounted in a "t cker 29. supported from said overhangmg arm 17 Specification of Letters Patent.

SEWING-MACHINE.

and operated from an eccentric on the drivmg shaft through a connecting rod 23. From the said overhanging arm 17 is also supported a looper rod 24 carrying at its forward -end a longitudinally reciprocating and rocking looper 25 operated from said driving:

shaft through a double crank connection. The stitch-formlng mechanism, comprising the needle and looper above referred to, is

essentially the same in its construction and operation as the stitch-forming mechanis1n of the machinesof Patentsv Nos. 639,669 and.6(9,553, above mentioned," and need not therefore be herein more fully described;

'while the mechanism for operating the feed dog 20 is essentially the same asthat of myslightly-in details of construction, and the forward end of said stitching frame may be lifted by pressing down .on the hand lever 26 as in the machine of my said application. I

In order to provide a proper clearance for the Work beneath the overhanging arm of the machine, and at the same time to properly operate a lower rotating feeding device, cooperating withan upper feeding device of feed dog, the improved machine comprises a novel lower feed operating mechanism which will now be described.

Rising from the front -part oi. the base portion 12 of the frame of the machine is awork-supporting arm or post 27 rigid and preferably formed integral with said base portion and to the top of which arm is secured a work-plate 28. livotally mounted in the said arm, so as to be free to have a limited rockingmoi'ement. is a block 29 in which is mounted a feed shaft. 30 provided at, its rear end with a ratchet wheel 31. said shaft 'having at its forward end a ball-like. stud 33 ente'ring a socket in a feedwheel 3d rigidly connected with a second feed wheel .35, said ball like portion of said shaft being providedwith a pin enteringa slotin the first-namedfeed wheel so as to be capable of imparting-a positive rotating movement to the said rigidlyconnected and preferably integra-ljfeed wheels 34 and Rigid with the feed wheel 35 is a ball-like stud 37 en- Patented Feb. 7,1911; I Application filed June 16, 1910. Serial No; 5G7,162.

tering a socket in a yieldingly mounted post 38 forced upward by a suitable coil spring 39. The block 29 is yieldingly pressed upward at its inner endby a coil spring 40. The feeding mechanism ust described is thus essentially the same as that-covered by the said Patent No. 679,553, but its operating mechanism, which will now be described, is

essentially different from-that of the, said patent.

The driving shaft 16 carries an eccentric which is connected by means of a rod 42 for the purpose of imparting'an intermittent rotating movement to the said feed shaft and to the feed wheels 34 and 35 operated therefrom. It will thus be seen that the operating mechanism just described affords an operative connection for the'feed shaft with the driving shaft throughthe base of the machine, so that asuitable clearance for the work above said base is; afforded without in any way interfering with the feed-operating mechanism.

The presser foot 46, rigidly connected 'with the overhanging arm 17, is provided,

as in the machines of the said patents, with a lon itudinal slot 47 through which a bend or ri go in the goods :through which the needle is to pass in forming blind stitching is forced by aridge-former 4:8. a

By reference to Fig. 3' of the drawings it will be seenthat the feed dog ZO-is arranged directly over the ridge-former 4-8 which latter serves as a support for the work against the'thrust of the feed dog. As shown in Figs. 1 and 2 the feed dog has a straight lower serrated face working against a straight or horizontal portion of the upper face of the ridge-former or worlrsupport 4S, and owing to the cooperative action of the feed dog and the ridge-former or work support 48, the said feed dog" has a strong grip upon the goods, so' that an accurate feeding ofthe latter is insured. Thus the feed dog cooperating with the ridge-former or work-' support, arranged directly beneath the said feed dog and also in cooperation with the lower feeding wheels- 34 and 35, provides a feeding .mechanism by which two plies of goods which arebeing' blind-stitchedwill be fed along together with the greatestaccuracy and uniformity, so that any-puckering of the work, owing to the uneven feeding of the two plies of-goods, will be absolutely avoided. a

Having thus described my invention I 55 claim and desire'to secure by Letters-Patent:

1. In a blind-stitch sewingmaehine, the combination with a frame comprising a base portion having at its forward end a raised worlc-support'and a raised portion at itsrear end, with a clear space between said rear raised portion and said raised work support, of a ridge-forming device mounted.

on said raised work-support, a transverse driving shaft journaled above the said base portion of said frame and provided with an eccentric, a stitclrforming mechanism operated from said driving shaft, a vertically vibrating lever pivoted in the base portion of said frame, a connecting rod operated by said eccentric and jointed at its lower end to the rear end of said lever, and a 'rotating feeding device mounted in the said worksupport and operatively connected with the forward end of the said lever.

2. In a blind-stitch sewing machine, the

combination -with a frame comprising a" base portion having at its forward end a raisedwork-support and a raised portion at its rear end, with a clear space between said rear .raised portion and said raised worksupport, of a driving shaft journaled above said .base portion of said frame, a ridgeforming device mounted on said iraised work-support, a stitch-forming mechanism operated from said driving shaft, a lever pivoted in the base portion'of said frame and operatively connected with said driving shaft, a rotating feed shaft provided with a ratchet-wheel, one or more feed wheels operated from said shaft, and a vertically reciprocating bar jointed to the forward end of said lever and provided with a pawl for' operating said feed shaft.

3. In a blind-stitch sewing machine, the combination with a frame comprising a base portionhaving at its forward end a raised worlcsupport and a raised portion at its rear end, of a driving shaft iournaled in the upper part of the said raised portion of said frame, a ridge-forming device mounted on said raised worksupport, a stitch-forming mechanism operated from said driving shaft, a lever centrally pivoted in the base portion of said frame and arranged transverse to said driving shaft and operatively 'conneeted therewith, and a rotating feeding "device mounted in the said work-support and operatively connected with the forward end'of the said lever.

4. In a blind-stitch sewing machine, the combination with a frame comprising a base portion having at its forward end a raised ;-worl -support and a raisedportion at its rear base portion of said frame and disposed transverseto said driving shaf's and operatively connected therewith, a rotating feed shaft provided with arat-chet-wheel, one or more feed Wheels operated from said shaft, I 1 and a vertically reciprocating bar Jomted to I the forward end of said lever and provided with a pawl for operating said" feed shaft.

In testimony whereof I afiix my signature,

in presence of two witnesses.

\VILLIAM A. MGCOOL.

\Vitnesses A. R. LEYDA, ROLAND GASTBELL. 

